I'm looking for someone to give my desktop a thorough clean-up. It’s a Windows PC, about 3 years old, with a mix of old programs, temporary files, and a few cluttered folders. I’d like a light hardware check as well (dusting inside the case if feasible) and a basic software tune-up to improve boot times and general responsiveness. Please advise on what tools you use and whether you can back up important files before starting. I prefer someone who can explain steps clearly and avoid making changes without my consent. Availability on weekday mornings would be ideal.